c++需要刷新变量

c++ need to refresh variable

本文关键字：变量 刷新 c++      更新时间：2023-10-16

我正在创建一个比较两个数组的程序；第一个数组，用户输入5个整数。在第二个数组中，计算机随机选择5个数字（两个数组都在0和9之间）。

我需要比较每个数组的元素，看看它们是否匹配。如果它们匹配，我将计数器变量加1。

（例如，用户输入0 2 2 9 6，计算机[使用兰特]选择2 3 2 9 0。元素3&4匹配，所以是2。现在每场比赛都有不同的场景）

我的问题是：用户还输入他们想要比较这些数组的次数（这是一个名为pick 5的游戏）每次循环时，我都需要将计数器重置为零我尝试使用flush命令，但它不起作用。

有什么想法吗？

int main ()
{
string name;
float total_amt, bet_amt, win_amt;
int play_amt, user_choice[5] = { }, com_choice[6], i, total=0;
int size = 5;
srand((unsigned)time(0));
cout<<"Welcome to pick 5, where the odds are never in your favor!"<<endl;
cout<<"What is your name?"<<endl;
cin>>name;
cout<<"How much money do you have?"<<endl;
cin>>total_amt;
cout<<"How much money would you like to bet?"<<endl;
cin>>bet_amt;
cout<<"How many times would you like to play?"<<endl;
cin>>play_amt;
for (i=0;i<play_amt;i++)
{ 
    cout<<"Pick 5 integers between 0 & 9 "<<endl;
    cin>>user_choice[0];
    cin>>user_choice[1];
    cin>>user_choice[2];
    cin>>user_choice[3];
    cin>>user_choice[4];
    com_choice[0] = (rand()%9);
    com_choice[1] = (rand()%9);
    com_choice[2] = (rand()%9);
    com_choice[3] = (rand()%9);
    com_choice[4] = (rand()%9);
    cout<<com_choice[0];
    cout<<com_choice[1];
    cout<<com_choice[2];
    cout<<com_choice[3];
    cout<<com_choice[4];

    if (user_choice[0]==com_choice[0])
    {
        total++;
    }
    if (user_choice[1]==com_choice[1])
    {
        total++;
    }
    if (user_choice[2]==com_choice[2])
    {
        total++;
    }
    if (user_choice[3]==com_choice[3])
    {
        total++;
    }
    if (user_choice[4]==com_choice[4])
    {
        total++;
    }
    cout<<"User matched "<<total<<"times"<<endl;

    // scenarios
    if (total>=0 &&total<3)
    {
        total_amt-=bet_amt;
        cout<<"Less than 3 of your numbers matched, tough luck"<<endl;
        cout<<"You now have $"<<total_amt<<"dollars left."<<endl;
    }
        else if (total == 3)
        {
            cout<<"You matched 3 and broke even"<<endl;
        }
        else if( total == 4)
        {
            win_amt = bet_amt*2;
            total_amt = total_amt + (win_amt - bet_amt);
            cout<<"Congrats! you matched 4!!"<<endl;
            cout<<"You now have $"<<total_amt<<"dollars!"<<endl;
        }
        else
        {
            win_amt = bet_amt*5;
            total_amt = total_amt + (win_amt - bet_amt);
            cout<<"WINNER WINNER YOU MATCHED 5!!"<<endl;
            cout<<"You now have $"<<total_amt<<"dollars!"<<endl;
        }
     // end nested if-else
}  // end for loop
} // end main

不需要在函数开始时"预先声明"所有变量。

如果您希望变量"重置"，请将变量声明移动到循环中使用它们的位置：

for (int i=0;i<play_amt;i++)
{
    int total = 0; // A new variable 'total', that starts at 0 each time through the loop.

您应该养成将任务委派给函数的习惯。total有问题，因为main()函数太长，很难跟踪该变量发生了什么。如果你的for循环看起来像这样，你会有更少的麻烦：

for (i=0;i<play_amt;i++)
{
  read_choices(user_choice);
  choose_random(com_coice);
  display_choice(com_choice);
  total = count_matches();
  cout<<"User matched "<<total<<"times"<<endl;
  total_amt += evaluate_scenario(total, bet_amt);
}  // end for loop
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